# US 12,218,421 B2 · First and second log-periodic antenna panels

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- Number: US 12,218,421 B2
- Document ID: US12218421B2
- Status: Granted
- Kind: B2
- Application number: 18/118,389
- Filed: 2023-03-07
- Published: 2024-09-12
- Granted: 2025-02-04
- Earliest claimed: 2023-03-07
- Assignees: The Government of the United States, as represented by the Secretary of the Army
- Applicants: The Government of the United States, as represented by the Secretary of the Army
- Inventors: Stephen Badger; Shuguang Chen
- Web page: https://patentgrep.com/patent/US12218421B2

## CPC

- H01Q 11/10: Logperiodic antennas (H01Q11/08 takes precedence)
- H01Q 21/08: the units being spaced along or adjacent to a rectilinear path {(waveguide fed H01Q21/0037)}
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

Various embodiments relate to antenna panels with different geometries. Two or more log-periodic panels, such as log-periodic antenna panels, can be arranged along about the same plane next to one another. In one example, two panels can be employed, a first panel and a second panel. These panels can have a geometry, with the first panel having a first geometry and the second panel having a second geometry that is a mirror of the first geometry.

## Claims

### Claim 1

A system, comprising:
a first log-periodic antenna panel with a first geometry; and
a second log-periodic antenna panel with a second geometry,
where the first log-periodic antenna panel and the second log-periodic antenna panel are arranged along about the same plane next to one another and
where the first geometry and the second geometry are different in orientation.

### Claim 2 (depends on 1)

The system of claim 1, comprising:
a first ground plate coupled to the first log-periodic antenna panel that causes the first log-periodic antenna panel to be more directional; and
a second ground plate coupled to the second log-periodic antenna panel that causes the second log-periodic antenna panel to be more directional.

### Claim 3 (depends on 2)

The system of claim 2, comprising:
a wall,
where the first log-periodic antenna panel and the second log-periodic antenna panel form an antenna panel set,
where the first ground plate and the second ground plate form a ground plate set, and
where the wall is disposed between the antenna panel set and the ground plate set to form a cavity.

### Claim 4 (depends on 1)

The system of claim 1, comprising:
a first feed coupled to the first log-periodic antenna panel;
a second feed coupled to the second log-periodic antenna panel;
a management component configured to manage the first feed to be at a normalized 0 degrees when exciting the first log-periodic antenna panel and to manage the second feed to be at a 180 degree offset from the first feed when exciting the second log-periodic antenna panel.

### Claim 5 (depends on 4)

The system of claim 4,
where the first feed connects to the first log-periodic antenna panel at a first angle of about 90 degrees and
where the second feed connects to the second log-periodic antenna panel at a second angle of about 90 degrees.

### Claim 6 (depends on 1)

The system of claim 1,
where the second geometry is a mirror of the first geometry,
where the first geometry has a circular footprint and
where the second geometry has a circular footprint.

### Claim 7 (depends on 6)

The system of claim 6,
where the first geometry has a first arm in a first hemisphere extending beyond normalized 45 degrees,
where the first geometry has a second arm in the first hemisphere extending beyond normalized 45 degrees,
where the first arm is in a first quadrant of the first hemisphere,
where the second arm is in a second quadrant of the first hemisphere,
where the first quadrant of the first hemisphere and the second quadrant of the first hemisphere are independent and distinct of one another,
where the first geometry has a third arm in a second hemisphere extending beyond normalized 45 degrees,
where the first geometry has a fourth arm in the second hemisphere extending beyond normalized 45 degrees,
where the third arm is in a third quadrant of the second hemisphere,
where the fourth arm is in a fourth quadrant of the fourth hemisphere,
where the third quadrant of the second hemisphere and the fourth quadrant of the second hemisphere are independent and distinct of one another, and
where the first hemisphere and the second hemisphere are independent and distinct of one another.

### Claim 8 (depends on 1)

The system of claim 1, comprising:
a third log-periodic antenna panel with the first geometry; and
a fourth log-periodic antenna panel with the second geometry,
where the third log-periodic antenna panel and the fourth log-periodic antenna panel are arranged along about the same plane next to one another and
where the second log-periodic antenna panel and the third log-periodic antenna panel are arranged along about the same plane next to one another.

### Claim 9

A system, comprising:
a first log-periodic antenna panel with a first geometry;
a second log-periodic antenna panel with a second geometry;
a first ground plate coupled to the first log-periodic antenna panel that causes the first log-periodic antenna panel to be more directional;
a second ground plate coupled to the second log-periodic antenna panel that causes the second log-periodic antenna panel to be more directional;
a first feed coupled to the first log-periodic antenna panel;
a second feed coupled to the second log-periodic antenna panel; and
a management component configured to manage the first feed to be at a normalized 0 degrees and to manage the second feed to be at a 180 degree offset from the first feed,
where the first log-periodic antenna panel and the second log-periodic antenna panel are arranged along about the same plane next to one another and
where the first geometry and the second geometry do not match in orientation.

### Claim 10 (depends on 9)

The system of claim 9,
where the second geometry is a mirror of the first geometry,
where the first geometry's footprint is circular, and
where the second geometry's footprint is circular.

### Claim 11 (depends on 10)

The system of claim 10,
where the first geometry has a first arm in a first hemisphere extending beyond normalized 45 degrees,
where the first geometry has a second arm in the first hemisphere extending beyond normalized 45 degrees,
where the first arm is in a first quadrant of the first hemisphere,
where the second arm is in a second quadrant of the first hemisphere,
where the first quadrant of the first hemisphere and the second quadrant of the first hemisphere are independent and distinct of one another,
where the first geometry has a third arm in a second hemisphere extending beyond normalized 45 degrees,
where the first geometry has a fourth arm in the second hemisphere extending beyond normalized 45 degrees,
where the third arm is in a third quadrant of the second hemisphere,
where the fourth arm is in a fourth quadrant of the fourth hemisphere,
where the third quadrant of the second hemisphere and the fourth quadrant of the second hemisphere are independent and distinct of one another, and
where the first hemisphere and the second hemisphere are independent and distinct of one another.

### Claim 12 (depends on 11)

The system of claim 11,
where the first feed connects to the first log-periodic antenna panel at an about 90 degree angle and
where the second feed connects to the second log-periodic antenna panel at an about 90 degree angle.

### Claim 13 (depends on 12)

The system of claim 12, comprising:
a wall,
where the first log-periodic antenna panel and the second log-periodic antenna panel form an antenna panel set,
where the first ground plate and the second ground plate form a ground plate set, and
where the wall is disposed between the antenna panel set and the ground plate set to form a cavity.

### Claim 14 (depends on 9)

The system of claim 9, comprising:
a wall,
where the first log-periodic antenna panel and the second log-periodic antenna panel form an antenna panel set,
where the first ground plate and the second ground plate form a ground plate set, and
where the wall is disposed between the antenna panel set and the ground plate set to form a cavity.

### Claim 15 (depends on 9)

The system of claim 9,
where the first feed connects to the first log-periodic antenna panel at an about 90 degree angle and
where the second feed connects to the second log-periodic antenna panel at an about 90 degree angle.

### Claim 16 (depends on 9)

The system of claim 9, comprising:
a third log-periodic antenna panel with the first geometry;
a fourth log-periodic antenna panel with the second geometry;
a third ground plate coupled to the third log-periodic antenna panel that causes the third log-periodic antenna panel to be more directional;
a fourth ground plate coupled to the fourth log-periodic antenna panel that causes the fourth log-periodic antenna panel to be more directional;
a third feed coupled to the third log-periodic antenna panel; and
a fourth feed coupled to the fourth log-periodic antenna panel,
where the third log-periodic antenna panel and the fourth log-periodic antenna panel are arranged along about the same plane next to one another and
where the second log-periodic antenna panel and the third log-periodic antenna panel are arranged along about the same plane next to one another.

### Claim 17 (depends on 14)

The system of claim 14,
where the first log-periodic antenna panel has a first circular footprint geometry,
where the second log-periodic antenna panel has a second circular footprint geometry,
where the third log-periodic antenna panel has a third circular footprint geometry,
where the fourth log-periodic antenna panel has a fourth first circular footprint geometry,
where the first feed connects to the first log-periodic antenna panel at an about 90 degree angle,
where the second feed connects to the second log-periodic antenna panel at an about 90 degree angle,
where the third feed connects to the third log-periodic antenna panel at an about 90 degree angle,
where the fourth feed connects to the fourth log-periodic antenna panel at an about 90 degree angle.

### Claim 18 (depends on 15)

The system of claim 15, comprising:
a wall between the antenna panels and the ground plates to form a cavity.

### Claim 19

A system, comprising:
a first log-periodic antenna panel with a first geometry;
a second log-periodic antenna panel with a second geometry;
a first ground plate coupled to the first log-periodic antenna panel that causes the first log-periodic antenna panel to be more directional;
a second ground plate coupled to the second log-periodic antenna panel that causes the second log-periodic antenna panel to be more directional;
a first feed coupled to the first log-periodic antenna panel;
a second feed coupled to the second log-periodic antenna panel;
a management component configured to manage the first feed to be at a normalized 0 degrees and to manage the second feed to be at a 180 degree offset from the first feed; and
a wall,
where the first log-periodic antenna panel and the second log-periodic antenna panel form an antenna panel set,
where the first ground plate and the second ground plate form a ground plate set,
where the wall is disposed between the antenna panel set and the ground plate set to form a cavity,
where the first log-periodic antenna panel and the second log-periodic antenna panel are arranged along about the same plane next to one another,
where the second geometry is a mirror of the first geometry,
where the first geometry's footprint is circular, and
where the second geometry's footprint is circular.

### Claim 20 (depends on 19)

The system of claim 19,
where the first feed connects to the first log-periodic antenna panel at an about 90 degree angle,
where the second feed connects to the second log-periodic antenna panel at an about 90 degree angle,
where the first geometry has a first arm in a first hemisphere extending beyond normalized 45 degrees,
where the first geometry has a second arm in the first hemisphere extending beyond normalized 45 degrees,
where the first arm is in a first quadrant of the first hemisphere,
where the second arm is in a second quadrant of the first hemisphere,
where the first quadrant of the first hemisphere and the second quadrant of the first hemisphere are independent and distinct of one another,
where the first geometry has a third arm in a second hemisphere extending beyond normalized 45 degrees,
where the first geometry has a fourth arm in the second hemisphere extending beyond normalized 45 degrees,
where the third arm is in a third quadrant of the second hemisphere,
where the fourth arm is in a fourth quadrant of the fourth hemisphere,
where the third quadrant of the second hemisphere and the fourth quadrant of the second hemisphere are independent and distinct of one another, and
where the first hemisphere and the second hemisphere are independent and distinct of one another.